myke pocock
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| posted on 28/2/09 at 12:12 PM |
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1300 x flow problem
Just waiting for my SVA date now but got a problem with my standard 1300 x flow engine. As the engine warms up I start to get some pressurising up the
dip stick tube (long flexible type) accompanied by some emulsification on the dip stick itself when pulled out. If I remove the dipstick from the
tube, steam comes from the tube. If I cover the tube I get steam from the crankcase breather on the side of the engine block. The engine is running OK
apart from needing the timing set up correctly. There doesnt appear to be any loss of water from the cooling system that I can detect. The engine was
rebuilt by me ages ago but not run until recently but I have replaced the head gasket recently as I had a coolant pressurising problem that turned out
to be a badly corroded water pump that wasnt pumping! I have drained the oil and theres no evidence of emulsification in it. I dont want to go for the
test with the dipstick tube bubbling away at the end of it. Any theories anyone?
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MikeRJ
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| posted on 28/2/09 at 12:15 PM |
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My first theory is that you've probably posted in the wrong section 
What crankcase breather system are you using on the crossflow? Have you actually had the engine up to full running temperature for any length of
time? Frequently starting the engine for short lengths of time will cause condensation to build up in the crankcase.
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myke pocock
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| posted on 28/2/09 at 12:34 PM |
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The crankcase breather is the standard type fitted to the side of the block with a one way valve in the top of it. I have an alloy rocker cover fitted
that only has a small hole (very small) in the filler cap but that is clear.
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Danozeman
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| posted on 28/2/09 at 12:39 PM |
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quote:
Frequently starting the engine for short lengths of time will cause condensation to build up in the crankcase.
Indeed. Plus just having it running and not driving it will do it aswell. Also lots of short journies.
Is it pressurising and pushing the oil cap off or the dipstick out or is it just that youv pulled them out and noticed it? You will get some air out
of the breathers normally. A cossflow will breath a little bit anyway.
The steam is probably condensation inside as its not been run up properly and had a good thrash to burn it off.
Id not worry about it and set your timing up and see how it goes.
Dan
Built the purple peril!! Let the modifications begin!!
http://www.eastangliankitcars.co.uk
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myke pocock
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| posted on 28/2/09 at 01:09 PM |
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No, it doesnt push the dipstick out, it just bubbles around the top of the dipstick or shows steam when I remove it and shows some emulsification on
the stick itself.
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mark chandler
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| posted on 28/2/09 at 02:21 PM |
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As above, condensation has probally built up, once you have given it a good run everything should be resolved.
Pressure is just water boiling off in the oil, only need a drop to produce a fair amount of steam.
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rusty nuts
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| posted on 28/2/09 at 04:00 PM |
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Check that the breather is clear they had a habit of blocking up . Replace it or heat it up and blow through with an airline until clear. Also the oil
filler cap should be a breather type, you can see a gauze in the underside if you look , cheap to replace . Clean the breather valve that is attached
to the breather hose inside the breather box, they get gummed up . Make sure the breather port in the manifold is clear
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myke pocock
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| posted on 28/2/09 at 04:06 PM |
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As far as I can tell I do not have a breather port on the manifold and the alloy after market rocker cover has a chrome filler cap with just a small
hole on the underneath and one on the top.
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rusty nuts
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| posted on 28/2/09 at 04:10 PM |
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What manifold/carb are you running? If it's a standard Ford item there will be a breather port in the manifold, it may be a tee piece for the
servo connection ?
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myke pocock
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| posted on 28/2/09 at 05:07 PM |
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Yes, standard Ford carb and inlet manifold which has a double take off below and to the left of the carb under the water inlet/outlet for the
manifold. Both stubby pipes are blanked off with rubber caps so will not breathe in any way though.
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rusty nuts
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| posted on 28/2/09 at 05:13 PM |
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Connect the breather hose to the take off, the vacuum will open the breather valve and relieve crankcase pressure and reduce fumes. Get a breather cap
on it.
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